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[ScienceDaily]New Way to Split Water Molecules Into Hydrogen and Oxygen - Page 5

post #41 of 89
My issue with the article is -
Quote:
breakthrough could make possible the design of inexpensive solar cells

At present, Hydrogen prices are going down because the costs of natural gas are low. This could help hydrogen production from electrolysis actually become competitive with natural gas reforming.
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post #42 of 89
Thread Starter 
Oh btw, people touting HC's should become familiarized with the efforts to increase Fracking.
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The Mad Cow
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post #43 of 89
Quote:
Originally Posted by erunion View Post

The trouble with using hydrogen as a fuel is its very unstable. (Think Hindenburg)
Plants have a very good solution for that; after splitting water molecules they attach carbon to the hydrogen. And thanks to them we have the perfect fuel, hydrocarbons.

Right. There is absolutely no way people would be ok with pumping a highly combustible and volatile liquid into their car that could easily burst into flames upon collision....
post #44 of 89
Quote:
Originally Posted by spitty13 View Post

Right. There is absolutely no way people would be ok with pumping a highly combustible and volatile liquid into their car that could easily burst into flames upon collision....

I like the humor! and your sarcasm actually has a lot of truth to it!
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mitx
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post #45 of 89
Quote:
Originally Posted by OcN13 View Post

This is very promising tech. Idk why people say hydrogen is a useless energy. It may take more energy to make it than it is stored but that is the way every energy medium is. Even fossil fuels that are already exisisting take more energy to extract/refine than they give back. Same thing with batteries.
Also by making the hydrogen with solar it is minimal cost especially considering the time the solar panels will keep producing for tens of years assuming no physical damage from external force. As someone already mention the have solid state bydrogen storage where the hydrogen is stored or attached to metal. No high psi or combustability required so it is very stable.
The solar efficiency record in real world use is 33% while the record in a lab is 43% achieved by G.E. Per yard of the earth at the best time and lattitudes recieve 1 kw per sec. Germany produced the same amount of solar power as the U.S. did with nuclear power in 2011 percentage wise which is about 20 %. Obviously 20% in America is more than 20% percent is in Germany. The point being is it proves how viable it is and the fact that Germany recieves less sunlight than London or Seattle. Why do some people some blame solar on not being efficient enough when every technology we use is extremely inefficient. If you go by that logic than the car or computer would have never been created.
You know what already has amazing solar efficiency, better than photovoltaics? Photosynthesis by plants.

You know what already is an amazing energy storage medium better than hydrogen fuel cells? Biofuels derived from plants.

So why reinvent the wheel?
post #46 of 89
Quote:
Originally Posted by atomicmew View Post

You know what already has amazing solar efficiency, better than photovoltaics? Photosynthesis by plants.
You know what already is an amazing energy storage medium better than hydrogen fuel cells? Biofuels derived from plants.
So why reinvent the wheel?

No I did not know plants convert that much energy from the sun. I am very curious to learn more if you have some good info.redface.gif

I deffinetly agree biofuels are amazing. Algae is the most promising and we could already have it up an running. With little investment a study showed that you could start with little algae and scale up to commercial production in weeks or months. It is so easy since algae grows so fast.
Biofuels have their place as another option but are only going to be a trasition at best. Compared to fuel cells there is still more pollution since your still burning some sort of organic material. Hydrogen has zero pollution assuming the energy has no pollution and is the most plentiful.

If not hyrdrogen it will be batteries. Obviously batteries need to come a very long way but when they do it will be an obvious choice of hydrogen b/c it will still be a liquid or even with solid state hydrogen you still need to get more. Once batteries are good enough charging will be quick enough and wireless. Mit also came up with a liquid that you can charge. Basically a liquid battery.

I don't consider it reinventing the wheel at all and even if it is so what? It's just progress, innovation and the inevitable march of technology. Same way all other tech is.
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post #47 of 89
Thread Starter 
Quote:
Originally Posted by atomicmew View Post

You know what already has amazing solar efficiency, better than photovoltaics? Photosynthesis by plants.
You know what already is an amazing energy storage medium better than hydrogen fuel cells? Biofuels derived from plants.
So why reinvent the wheel?

We already did re-invent it. And most of what we've discovered is that we can make more power and do it more efficiently. So that's why.
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The Mad Cow
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post #48 of 89
Quote:
Originally Posted by atomicmew View Post

You know what already has amazing solar efficiency, better than photovoltaics? Photosynthesis by plants.
You know what already is an amazing energy storage medium better than hydrogen fuel cells? Biofuels derived from plants.
So why reinvent the wheel?

I agree, with current infrastructure, biofuels make sense, but H2 cells will always be more efficient than an ICE. The process for hydrogen production via natural gas implies production could happen at the pump provided a natural gas supply(which reduces the need for pre-existing H2 infrastructure). The possibility that this new technology imposes on H2 production from electrolysis of water, plus all the other electrolysis research further lends itself to a hydrogen infrastructure that would be safer and cleaner than the current gasoline/biofuel method of transportation via tankers/trucks.

Hydrogen is an evolution of the wheel. Initially, it wont make a ton of "green" sense, but it's the most efficient model proposed at the moment.
Edited by ryboto - 11/13/12 at 1:15pm
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mitx
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post #49 of 89
Quote:
Originally Posted by erunion View Post

I'm not concerned by global warming. The world's temperature has fluctuated wildly long before human's were even around. GW is more about fear of change than anything else. Even if humans had zero impact on the climate, oceans would still continue to rise and fall.


Anyway... global warming isn't exactly a major concern in the short term, but denying our specie's impact on the environment is simply incorrect given the enormous bodies of evidence to the contrary. When all evidence disagrees with your hypothesis, disregard your hypothesis.

The idea that the current projections for climate change are part of some "natural cycle" is simply FUD.
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post #50 of 89
The amount of scientific fail in this thread is staggering...
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